Kidneys not functioning bp reached 30/20

Hi doc, Its about my grand ma... Since 2-3days she experience Dirahea and was passing urine too later she was passing loose stools unconsciously so had to use pampers for the 1st time for her...bed was getting wet due to urine... She dint had any food due to nausea for a day Or may b a little... So next day she was taken to doctor in daytime nd was kept till night at emergency ward she was still better but later night was shifted to icu nd tests were done her creatinine came 2 kidneys not functioning nd till next morning no urine was passed at all.Her bp was low... She already had bp meds and for high sugar(insulin) was been taken by her own since many years Now her condition is getting worse creatinine got 4 from 2 ,bp got low as 0 doc says she is sick and dont know wt will happen next... All medical help is being given.She is lying in bed without a single movement since a day on ventilator Wt r we suppose to do to help her recover from this? Wt has caused to reach her this stage?